The vertical length concerning any two consecutive contours is named a contour interval. Suppose a map features contour strains of a hundred m, ninety eight m, 96m, and so forth. আমরা সারা বাংলাদেশে আমাদের সার্ভিস প্রদান করে থাকি। Line bodyweight is solely the darkness or thickness of the road applied. https://contoursurveyinbangladesh82716.bcbloggers.com/31735640/fascination-about-contour-survey-in-dhaka